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♦ Refractometer for cooling system liquid analysis -EQ 7093
(VWB) - ou - T 10007-
Note
The exact value for the following checks may be read in the light-
dark limit. To better see the light-dark limit, use a dropper/pipette
to put a water drop on the glass. Now the light-dark limit may be
easily recognized by the “WATERLINE”.
– Check the concentration of antifreeze additive with the Re‐
fractometer for cooling system fluid analysis -EQ 7093 (VWB)
- ou - T 10007- (follow the instruction manual).
The scale -1- of the refractometer is related to coolant additives -
G 12- and -G 11-.
The scale -2- is related to the cooling additive -G 13-.
Note
♦
The antifreeze protection must be guaranteed in approximate‐
ly -13 ° F (in Arctic climate countries in approximately
-31.00 ?).
♦
Due to climatic reasons, a higher antifreeze protection is nec‐
essary, so the percentage of G 12 may be increased, but only
up to 60% (antifreeze protection to approximately - 40º F), be‐
cause the antifreeze protection can be reduced again and,
additionally, the cooling action is worsened.
– When the antifreeze protection is too weak, drain the differ‐
ence volume mentioned in the antifreeze protection table
⇒ page 77
and replace with the cooling additive -G 12- ac‐
cording to TL VW 774 F.
WARNING
♦ Follow the rules for disposal!
4.30.2
Antifreeze table
Antifreeze protection up to º F Difference quantity in liters
14)
Actual value
12)
Nominal value
13)
0
-25
3,0
-35
3,5
-5
-25
2,5
-35
3,5
FOX 2004 ➤
Maintenance - Edition 07.2010
4. Service descriptions
77